/*字体样式*/
.my_font{
    font-style: italic ;
    font-weight: bolder ;
    font-size:2.75em;
    font-family: 华文中宋,serif;
    line-height: 5em;
}
/*文本样式*/
.my_text{
    border: 1px solid  black;
    width :30rem;
    height: 10rem;
    /*letter-spacing: 1rem;*/
    vertical-align: middle;
}
/*颜色样式3*/
.my_color{
    border: 1px solid black;
    width: 30rem ;
    height: 10rem;
    color: blue;
}
/*背景样式*/
.my_bg{
    border: 1px solid black;
    width: 50rem;
    height: 20rem;
    background: #c82333 url("https://www.baidu.com/img/bd_logo1.png")no-repeat 30% 30%;

}
/*列表样式*/
.my_list{
    list-style-type: circle;
    list-style-image: url("http://www.jju.edu.cn/images/ico1.gif");
}
/*盒子模型*/
.my_box{
    width: 50rem;
    height: 20rem;
    border: 1px solid black;
    margin: 1rem 1rem;
    padding: 1rem;
}